9E: Pinnacle Airlines
AA: American Airlines
AS: Alaska Airlines
B6: JetBlue Airways
CO: Continental Airlines
DL: Delta Air Lines
EV: Atlantic Southeast Airlines
F9: Frontier Airlines
FL AirTran Airways:
HA: Hawaiian Airlines
MQ: American Eagle
NW: Northwest Airlines
OH: Comair
OO: SkyWest Airlines
UA: United Airlines
US: US Airways
WN: SouthWest Airlines
XE: ExpressJet Airlines
YV: Mesa Airlines